1// Derived from Inferno utils/6l/obj.c and utils/6l/span.c
2// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/obj.c
3// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/span.c
4//
5//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
6//	Portions Copyright © 1995-1997 C H Forsyth ([email protected])
7//	Portions Copyright © 1997-1999 Vita Nuova Limited
8//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
9//	Portions Copyright © 2004,2006 Bruce Ellis
10//	Portions Copyright © 2005-2007 C H Forsyth ([email protected])
11//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
12//	Portions Copyright © 2009 The Go Authors. All rights reserved.
13//
14// Permission is hereby granted, free of charge, to any person obtaining a copy
15// of this software and associated documentation files (the "Software"), to deal
16// in the Software without restriction, including without limitation the rights
17// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18// copies of the Software, and to permit persons to whom the Software is
19// furnished to do so, subject to the following conditions:
20//
21// The above copyright notice and this permission notice shall be included in
22// all copies or substantial portions of the Software.
23//
24// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
27// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30// THE SOFTWARE.
31
32package obj
33
34/*
35 * add library to library list.
36 *	srcref: src file referring to package
37 *	objref: object file referring to package
38 *	file: object file, e.g., /home/rsc/go/pkg/container/vector.a
39 *	pkg: package import path, e.g. container/vector
40 */
41
42const (
43	LOG = 5
44)
45
46func mkfwd(sym *LSym) {
47	var dwn [LOG]int32
48	var cnt [LOG]int32
49	var lst [LOG]*Prog
50
51	for i := 0; i < LOG; i++ {
52		if i == 0 {
53			cnt[i] = 1
54		} else {
55			cnt[i] = LOG * cnt[i-1]
56		}
57		dwn[i] = 1
58		lst[i] = nil
59	}
60
61	i := 0
62	for p := sym.Func().Text; p != nil && p.Link != nil; p = p.Link {
63		i--
64		if i < 0 {
65			i = LOG - 1
66		}
67		p.Forwd = nil
68		dwn[i]--
69		if dwn[i] <= 0 {
70			dwn[i] = cnt[i]
71			if lst[i] != nil {
72				lst[i].Forwd = p
73			}
74			lst[i] = p
75		}
76	}
77}
78
79func Appendp(q *Prog, newprog ProgAlloc) *Prog {
80	p := newprog()
81	p.Link = q.Link
82	q.Link = p
83	p.Pos = q.Pos
84	return p
85}
86